Typewriting machine



maa as Nov. 8, 1932.

' B. c. STICKNEY TYPEWRITING MACHINE 3 SheetsSheet 1 Filed Nov. 7, 1929Nov. 8, 1932. B. c. STICKNEY TYPEWRITING MACHINE Filed Nov. 7, 1929 3Sheets-Sheet 2 r w m V m 3 B. c. STICKNEY 1,886,845

TYPEWRITING MACHINE Filed Nov, 7, 1929 5 sheets-sheet 3 drives theplaten,

' Patented Nov. 8, 1932 UNITED PATENT orricsi .BURNHAM o. sT'IoKnEY, 0FHILLSIDE, NEW JERSEY; ASSIGNOR. T0 UEDEEWOOD ELLIOTT FISHER cor/mama, onNEW YORK, it. an ooaronacrron' or DELAWARE rYPEwE-rrrivq MACHINEApplication filed November 7, .Seriai Ito. 405,307.

This invention relates to line-spacing mechanism of typewriting machinesof the class in which minute variations of the line-space movement canbe produced, and inwhich a line-space regulator can also be adjusted forspacin the required number of linespace units at each stroke of thelever which returns the typewriter-carriage.

One of the main features of the invention is to effect the desiredmovements of the lever to the revoluble platen.

The line-space mechanism is shown mounted upon a carriage which shlftsup and down, as in the well-known Underwood nolsel'ess typewrltingmachine. 7

Upon the platen-axle 1s fixed a bevel gear and meshing therewith 1s asmall bevel pinion that is fixed upon a vertical mam arbor, the

latter having a thumb-wheel at its top;

Meshing with the pinion is a large gear that Also fixed upon the mainarbor is a ratchet-wheel having a great multitude of very fine teeth. Tosecure a suiticient number of teeth, the ratchet-wheel may have greatdiameter, say 25 per cent. greater than the diameter of the platen; theproportions and connections being such that the pe ripheral travel ofsaid ratchet-wheel is several times that of the platen.- 1

concentrically with the ratchet-Wheel is mounted a pivoted driving arm,which carries A fea ture of the invention resides in pivoting the p apawl to drive said ratchet-wheel.

line-space lever directly upon said arm. This or an equivalentconnection avoids the L necessity of employing several gears, and

lightens the task of operating the line-space handle or lever, whichextends forwardly from said arm.

. Said pivoted line-space lever is moreover slidably fulcrumed betweenits ends upon a stationary pin or stud, which may be mounted in front ofsaid vertical arbor.- Said pawl bearing arm is a lever of the thirdclass, having pivoted thereto between its ends'the rear end of saidline-space lever. This pivotal point may be. in the rear of saidvertical arbor;

and it is'practicable to swing said arm, together with said 'ratch'etwheel, through about 120' degrees at a full stroke tithe linespacelever. 4 v i The ratchetnvheel being of great diameter, and its teethhaving minute pitch, it"result's that a multitude of the fine teeth areincluded Within a stroke of 120 degrees of the ratchet wheel, which isan advantage in that it makes it feasible to secure a practicallyuniversal variation in the measu'r'ement'of the line space unit. Thisadjustment of the: unit is effected by setting the aforesaid lines'paoelever fulcrum forward or backward; the linespace lever beinglongitudinally slotted to accommodate the adjustment of its fulcrum.

When its fulcrum is at the forward position,

the line space lever effects a maximum stroke of the'platen; WVhen thefulcrum is at the rear position, a minimum stroke is imparted to theplaten; The fulcrum-pin may be set to any intermediate position, andthus secure proportionate variation in the rotation of the platen for agiven extent of'stroke of the linespac'e lever. i

An advantage is that said fulcrum pin is stationary, being rigidlymounted upon the typevvriter-carriage, and being readily adjusted uponsaid carriage, and aflording reliability, cheapness and simplicity overprior methods of effecting universal variations inthe measurement of theline-space unit;

The driving stroke of the lever is arrested by the engagement of thepawl with a fixed stop, which co-operates with the pawl to lock theratchet-wheel and platen against overthrow.

In its return movement, the line space lever is arrested by a novelregulator-train, which may be set for one-half, one, one and onefourth,one and one-half, two, two and one half or three line-space units; Thelength of each line-space unit is determined the setting of said fulcrumof the line sp'a'ce lever.

Said regulator possesses features of novel'- ty, being itself in theform of a lever-train,

which may be somewhat similar to and seiner dent with the line spa'celever-train; The

regulator-lever and the line-space lever have 166 platen, and alsoleaving the ratchet-wheel free to be revolved idly with the platen whenthe latter is occasionally rotated, either by means of said verticalarbor and its thumb wheel, or by means of the finger wheels fixed uponprojecting ends of the platen-axle.

Said regulator-lever has a movable locating tooth, to engageproperly-spaced notches which form a row upon the edge of a table orplate which is mounted upon the carriage. The regulator-lever also has alug which limits the return stroke of the line-space lever. The twolevers can. if desired be swung together in either direction about theirfixed fulcrum, when it is desired to alter the setting of theline-spaceregulator-lever. This swinging movement of both levers has no tendencyto rotate the ratchet-wheel and platen, since the pawl or ratchetremains disengaged at this time, from theratchet-wheel.

Owing mainly to the coincidence of the line-space regulator-lever withthe line-space lever, and to the coincidence of the pivotedinterceptor-arm with the pawl-carrying drive arm, like movements of theline-spacelever train and the regulator-lever train producecorresponding effects. Therefore, by swinging the regulator-lever to'anydesired point, and setting it there, the length of the stroke of theline-space lever may readily be predetermined, The regulator-lever islongi tudinally slotted like the line-space lever; and when the fulcrumis adjusted along one slot itis adjusted to just the same extent alongthe other slot, so that subsequent adjustment 0f theregulator-lever tolocation fora given number of line-spaces, controls the subsequentmotion of the line-space lever for driving the platen tothe extentdesired.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a sectional plan of a linespacing mechanism, showing thepresent improvements applied to the Underwood noiseless typwritingmachine; the parts being in normal positions, and adjusted for threeline-spaces, the line-space unit of measurement being adjusted at themaximum.

Figure 1 is a plan of the table and th regulator pin.

lever.

- Figure 7 is a sectional end elevation of the noiselesstypewriter-carriage andthe linespacing mechanism, showing the adjustmentfor approximate maximum line-space-unit measurement. 7

I Figure 8 is a sectional front elevation of the'same.

' Figure 9 is a sectional elevation of the carriage, showing the framingof the linespacing mechanism, and also the forward end of the line-spaceregulating train.

Figure 10 is a sectional front elevation, showing the mounting of thefixed stud which is adjustable for universallyvaryingthe-line-space-unit measurement. 7

A carriage-returning and line-spacing handle 10 projects forwardly froma table 11, forming part of a bracket, which is secured upon theleft-hand end plate 12 of the carriage 18 of an Underwood noiselesstypewriting machine; a platen 14 being j ournaled in said carriage bymeans of an axle 15 having at each end a hand-wheel 16.

Said handle may be in the form of a lever of the first order, whichturns about a vertical stationary fulcrum-pin 17. At its rear end saidlever 10 is articulated at 18 to a lever 19 that carries at its outerend a pawl 20. At its end the pawl-lever 19 is pivoted concentricallywith a vertical rotary main shaft 21. Fixed upon said main .shaft is awheel 22 of great diameter, having ratchet-teeth 23. c It will be seenthat as the carriage-returning lever lOis driven from left to right atFigure 1, its rear end swings about the fulcrum 17 from right to left,carrying lever 19 in the same direction, together with the pawl 20,which at this time ,is meshing with the ratchet-teeth 23. Thus the wheelis revolved, together with a bevel pinion 24 that is also fixed upon.said vertical main shaft 21; said pinion meshing with a large bevel gear25, which is fixed upon the platen-axle 15, thereby line-spacing theplaten 14.

The pawl-lever 19 is a lever of the third order, and is employed for thepurpose of multiplying the movement of the pawl 20, as compared with themovement. of the driving pivot 18. The parts are so arranged that thismovement-multiplying lever 19 can swing, together with the ratchet-wheel22,

through an arc of about 120 degrees, at a maximum stroke of theline-space lever 10.

Since the ratchet-wheel 22 may be made of Figure 2 is a plan of aline-space adjusting.

great diameter, as compared with the platen,

say 50 to the inch, if desired, or even a finer pitch, substantiallyaccurate spacing of the platen is reliably secured, since a variation sinificant variation in the line-s aacin of o p a:

the work-sheet.

This result is secured without the need of i; x using movementmultiplying gearing, as

heretofore, between the line space-handle and the driving pinion-axle orarbor 21. Thus there may be secured simplicity of structure andoperatioinand cheapening and lightness of parts, and compactness of theentire linespace mechanism. The means for preventing overthrow of theratchet-wheel 22 and the platen, and also the means for automaticallyreleasing the pawl from the ratchetwheel after every stroke, willpresently be de scribed.

In order to secure universal variation in the measurement of theline-space unit, the fulcrum-pin 17 is made adjustable to diii'er-entpositions lengthwise ofthe line-space lever 10, to shorten either armthereof while lengthening the other arm. The lever is provided with alongitudinal slot 26, to accommodate such adjustment of the fulcrum-pin17, and a maximum variation of 100 per cent or more, in the measurementof the line-space unit, may be secured by adj ustin the fulcrunrpin 17from its extreme rearward position to its extreme forward position.

The fulcrum-pin 17 may be set either at its extreme forward position, togive a maximum measurement of line-space unit, or at its extreme rearposition to give a minimum measurement, or at any position intermediatesaid limits; and it is always rigidly retained by the friction-tongue36.

The direction of adjustment of the fulcrum-pin 17 is along theline-space lever slot 26 when the latter is seen at the extremerighthand end of its working stroke. The lever at this time is arrestedby means of a stop 27, which is in the path of the spacing pawl 20, seeFigure l; the head of the pawl being beveled at 28, and the stop 27being given a corresponding inclination, for the purpose of locking thepawl into the teeth of the ratchetwheel, so that the latter cannot beoverthrown by reason of the momentum of the platen geared thereto.

There is therefore an invariable stopping position for the drive strokeof the line-space lever, i. e., its position when the locking of thepawl prevents the overthrow of the platen.

The fulcruinpin 17 is supported for adj ustment by means of a slide 29,which underlies the top 30 of the table 11, and is provided with afinger-piece 31 that extends up through a slot 32 and the table-top, forconvenience in forcing the slide forwardly or backwardly.

The slide may be confined against the tabletop by means of a stationarysupporting guide bracket or plate 33, having its side edges turned up toform opposite parallel ways or guides 34 for the slide 29. The lattermay have an incision 35,providing aspring-tongue 36, bearin against aguide 34, and aifording sufficient friction to retain the slide 29firmly wherever it is adjusted. Said supporting and guiding plate 33 isstaked, riveted or otherwise secured to the top of the table, as at 37.

The slide 29 and the guide 33 are arranged diagonally, extending in thesame direction as the slot 26 in the line-space lever when seen at theend of its driving stroke, as at Figure 4:. The fulcrum-pin 17 maytherefore be adjusted forwardly or backwardly by means of thefinger-piece-31 thereon, while the lever 10 re mains in the Figure 4position, and without vibrating the lever. The object in providing forthe adjustment of the fulcrum-pin in this diagonal direction, is toinsure that'no' matter what the length of driving stroke of the lever 10may be, it will always be arrested, together with the spacing pawl, theratchet-wheel and the platen, by means of the overthrow-stop 27, whoseposition remains fixed. In other words, the stroke of the line-spacelever is variable in a number of ways; but in all of its strokes, ofwhatever length, it comes to the same stopping position, with the pawlagainst said stop 27.

It will thus be seen that by pivoting or connecting the driving memberof the line,- space lever to a movement-multiplying arm, the lattercarrying the multiple-tooth linespace pawl, and by forming theratchet-wheel with a great multiplicity of finely-pitched teeth andgiving it a maximum stroke of say 120 degrees, and by having thefulcrum-pin 17 stationary and firmlv supported upon a slide foruniversal adjustment, a very simple driving train is provided betweenthe linespacing fingenpiece 39 and the short geartrain which forms themovement-reducing element between the line-space wheel and the platen,so that the desired result may be obtained without using more than twogears, with a simple, light, inexpensive, compact train going from theline-space finger-piece 39 to said gears.

When it is desired to efiect an adjustment of the line-space leverfulcrum-pin 17 by means of the finger-piece 31, the line-space levermay, if desired, be swung to Figure 4 position, with the axis of theslot 26 coincident with the diagonal path of adj ustment of thefulcrum-pin 17, Figure 1; where-' by adjustment of the fulcrum-pin toany sired point may be effected without the need of stirring theline-space lever from the ure 4 position. When, however, the linespacelever is in normal position, Figure 1, its slot 26 lies at ananglerelatively to its position at Figure 1. If the fulcrum-pin 17 is forcedrearwardly by means of its finger-piece or head 31, when lever 10 is inFigure 1 position, its direction of adjustment being determined by theslide 29 and the fixed guides 34, it will'result that the linespacelever will be forced to vibrate idly towards the left at its rear end,together with pawl-arm 19. A shoulder 40 on the forward part of saidlever normally presses agains a stop 41. I

The rearward adjustment of the fulcrumpin 17 shortens the rear arm ofthe lever 10 and lengthens the forward arm, so that ample regulation canbe secured by means of a relatively short travel of said fulcrum-pin,thus conducing to efiiciency as well as compactness and lightness ofmechanism.

To the lower end of the fulcrum-pin 17 may be swiveled a guide-block 42,having side grooves 43 to fit over the edges of slot 26 in theline-space lever 10, to afford stability and minimize wear. At itsforward end the lever-slot 26 may have an enlargenent 44, permitting theguide-block 42 to be inserted or removed, and facilitating theassemblage of the lever and fulcrum-pm. The guide-block 42 and the leverare supported by a collar 45 that is secured upon the lower end offulcrum-pin 17.' The latter at its upper end is threaded intofinger-piece 31, which has the form of a nut, to draw the fulcrum-pinupwardly and thereby cause a collar 46 to press up against the-b0 tom ofthe slide 29. Said collar fits over a reduced upper shank-portion 47 ofthe fulcrum-pin. 17.

Upon the latter is placed a collar orwasher 48, resting upon theshoulder of the pin l7, and drawn up thereby against the collar 46,which has also a shoulder. The finger-nut 31 it will be seen is threadedupon the shank 47 of the pin. Said finger-piece 31 extends up throughdiagonal slot 32 in the table-top 30. The supporting plate 33 may havecorresponding diagonal slot 49 to accommodate the travel of the collar46. The mounting of the adjustable fulcrum-pin dire *t-ly upon astationary element, insures rigidity of the pin, and contributes toaccuracy of operation, while the adjustment of the pin is simplified andimproved. The table-top 30 may be provided with an index at 50 and scale51, for use in adjusting the pin along the slot 32.

From the foregoing it will be seen that the platen may be line-spacedrepeatedly by operating the carriage-returning lever 10, since thelatter imparts to the line-space wheel 22 repeated rotations through amuch greater angle than the vibration of the linespace-lever; themovement of said line-space wheel being transmitted through verticalarbor 21, pinion 24, gear 25 and axle 15 to the platen; the drive strokeof the line-space lever being arrested by the overthrow-stop 27 and itsreturn stroke being arrested by the stop 41. Owing to the fineness ofthe pitch of the teeth 23, the possible error in the stroke of the wheelis made very slight, and this tolerance is further reduced by theco-operation of the small pinion 24 and the large gear 25, the latterbeing preferbly of greater diameter than the platen. At any time thefulcrum-pin 17 may be set forwardly or backwardly by the finger-piece31, thus affording a variation in the rotation of the line-space wheeland platen for the same stroke of the lever. The latter is returned tonormal position by a prin 52, bearing againt a lever-pin 53, the otherend of the spring 52 hearing at 54 against the flange or side of thetable 11. The lever 10 at its rear portion is curved or formed into agoose-neck at 55 to clear the vertical main arbor 21, etc.

The pawl-lever 19 may be provided with a hub 56, which is pivoted upon ageneral shaft or bearing-post or stem 57, which is dropped from thetable-top 30, and is made hollow to serve as a bearing for the verticalarbor 21, line-space wheel 22 and pinion 24. The hub of the pawl-lever19 rests upon a shoulder 58 that may be formed upon the lower portion ofsaid shaft, and the latter is drawn upwardly by a fastening nut 59,which is threaded upon the upper endof the post that extends up througha hole in the tabletop 30. A collar 60 is confined between the table-topand a shoulder 61 on the shaft, and this collar enables the screw 59 toforce the shaft firmly up to a seat, so that its rigidity during theoperation of the machine is assured.

The pawl-lever 19 is confined loosely between the shoulder 58 and thecollar 60. The pawl-arm 19 overlies the ratchet-wheel 22, and the pawl20 is pivoted at 62 to the under side of said arm 19.

It will be seen that by a simple swing of the lever 10 to the rightabout fulcrum 17, the lever 19 is turned about the general hearing post57, thus carrying the pawl 20 and the ratchet-wheel 22, together withvertical shaft 21 and pinion 24, whereby the gear 25 and the platen-axleare rotated. The number of parts is thus minimized, action is direct,and efiiciency and accuracy are secured,

as well as compactness, simplicity, cheapness, and ready applicabilityto existing machines; the invention not being limited to the aforesaidUnderwood noiseless machine. The variability of the relative'lengths ofthe arms of lever 10 gives ample scopeof universal variation of themeasurement of the linespace unit. The results are gained by means ofpositively moving parts, avoiding liability of erroneous action whichwould be apt to arise if frictional driving had to be depended upon. 7

It will be understood that the normal poition of the pawl-arm 19 isdifferent for connecting the pawl 20 from the linespace 2 cept andrelease the pawl.

wheel 22, thereby to permit independent rotation of the platen eitherforwardly or back- Wardly, by means of one of the hand-wheels 16 or bymeans of a thumb-wheel 63. The latter it will be seen is fixed upon theprojecting top of the vertical line-space-wheel shaft 21; and it will beunderstood the platen rotates at the same angular speed as 16 but atmuch less angular speed than 63, whereby fine adjusment of thework-sheet is afiorded at any time by means of 63, in view of the normaldisconnection of pawl 20 from line-- space wheel 22.

It is desired to secure accuracy of stroke of the line-space wheel atthe line-spacing operation, and for this reason the multipletooth pawl20 must come accurately into automatic mesh with the ratchet-wheel atthe beginning of the drive stroke of lever 10. This engagement of thepawl is effected by its returning spring 64, under the control of a cam65, which normally restrains the pawl by means of a pin 66 that isprovided upon pawl-arm 67. This cam, it will be understood, lies in thepath of the pin 66, to be struck thereby at the conclusion of the returnstroke of the line-spacing train, whereby the pawl is cammed out of meshwith the ratchet-wheel 22, Figure 1. One of the features of theinvention is the provision of means whereby this release of the pawl,and its re-engagement with the wheel, are properly timed, throughout allof the variations in the measurement of the line-space unit which aresecured by different adjustments of the fulcrum-pin 17 This isaccomplished without depending upon uncertainly-operating frictiondevices for controlling the engaging and disengaging movements of thepawl 20. This positive action is secured by simple means, inasmuch asthe adjustment of the line-space lever fulcrum-pin 17 is also madeeffective to adjust the position of the pawlreleasing cam 65. Thisresult is secured by providing a earn-train, and in many respects thiscam-train is coincident with the linespace lever train, see Figure 1.

The pawl-controlling cam-train includes an arm or lever 68 which isfulcrumed upon the same general shaft or hearing post as the pawl-arm19, so that it may swing around said shaft to any desired position tointer- Said arm 68 is articulated at 69 to a forwardly-extending lever70, having a goose-neck portion 71 and a longitudinal slot 72, so thatsaid lever mainly resemblesin plan and displacement the line- 1 spacelever 10; the pivot 69 being coincident with 18, the lever bearing. 73being concentrio with the shaft 57, the lever having goose-neck 71 andthe slot 7 2 of the lever being fitted to the same fulcrum-pin 17 thatis used for the line-space lever 10.

When the pin 17 is adjusted along the linespace lever, it issimultaneously adjusted along the cam-lever 70, and to the same extent.The effect is the same upon both trains. If the parts are in the Figure1 position during such adjustment, both the line-space lever and thecam-lever will be swung to the left to the same extent; and the samewill be true of the cam-lever 68 and the pawl-lever 19, as well as thepivots 18 and 69. Rearward adjustment of the pin 17 will thereforeeffect a reduction in the driving stroke of the pawllever 19, thereby toreduce the stroke of the ratchet-wheel, while the cam 65 swings to acorrespondingposition toward the left, so that thereafter the pawl maysooner be withdrawn automatically from the ratchet-wheel, but withexactness of timing; and it is also re-engaged to the ratchet with exacttiming upon the starting of the succeeding line-spacing stroke. 7

It will be seenthatan advantage is gained in using a line-spacing leverwhich is pivoted at its driving point to a movement-multiplyingpawl-lever, inasmuch as the pawl-releasing device may be located bymeansof the same device 17 which varies the extent of stroke of the levers 10and 19. The adjustment of cam 65 is automatic and exact, simplyefi'ected, and dependable. J t is a feature of the invention thatuniversal variation is obtainable in the extent of stroke of the pawlarm19, and a concomitant resetting of the pawl-controlling cam 65 toanexactly corresponding extent; and since theadjustment of 65 ismechanically effected without attention of the operator to'said cam, theoperator needs only to adjust the single pin 17. 7

The coincidentlevers 10' and 70 may be compactly placed facewise, oneabove the other, in the machine, Figure 7, the vertical fulcrum-pin 17being common to the levers, passing through both. Coincident with 18 ispivot 69, connecting-arm 68 tothe bail which includes the rear end oflever 70,- said bail having arm 74 which has a bearing 7 3 thatiscoincident with the bearing 75 of bail-arm 68. Said arms 74 and 68 itwill be seen may be formed as a bail in one piece, with an interveningvertical web-plate 76 the arm 74 overlying 68, see Figure 6. The lowerbail-arm 68 may rest upon a flange 77 that is formed upon the bottom ofbearing 57; and hub or bearing 75 may be fitted upon said bearing 57 forrocking motion. The upper bail-arm 74 may be fitted at 7 3 upon acylindrical portion of shoulder 61 that is formed on the collar 60. Thisbail-structure 74, 76, 68 may therefore be confined between 77 and 60for pivotal motion, to permit adjustment of the cam 65.

v provided for effectinguniversal variation in to l tions.

the measurement of the line-spacing unit, the strokes of the line-spacelever being positively limited in both directions for all adjustments,and the line-space pawl being automatically released from the line-spacewheel and automatically re-engaged therewith, with exactness of timingin correspondence with any adjustment. The last is effected by merelyslipping the finger-piece 31 along the slot 82. The parts are firmlysupported throughout, and reliability of action is secured for anydesired adjustment.

The table 11 may comprise a top plate 30 and a depending flange, and mayoverlie the ieversystem and the line-space wheel. Said table may extendfrom the left from a verti- -cal.bracket in the form of a plate 7 8 thatis secured byrscrews 79 upon the left-hand carriage-end 12 of saidnoiseless machine; said "end having a'bearing 81 for the platen-axle.

An auxiliary vertical bracket 82 may be se cured by screws 83 to theleft-hand end of the carriage 13 in said machine, and may rise "at theleft of the gear 25 and have a bearing "for the platen-axle 15. It mayalso be provided witha bent-out flange 84, to form a bearing for thelower end of the vertical main shaft 21. This bracket 82 may, at itstop, be bent to the left'to form a plate 85 having atits left-hand endthe bent-up beveled stop 27. A brace 86 may also be extended up from 85and secured by screws 87 to the flange at the left-hand side of thetable. The improvement may be manufactured and supplied as'a unit forattachment to noiseless machines.

The aforesaid arrangement of coincidently mounted line-spacing andspace-measuring trains is of advantage not only for its capacity forminutely varying the measurement of the line-space unit, but alsobecause of an added feature that the trains may be made to do furtherduty in regulating the gross line spacing stroke of lever 10. It isdesired in such regulation, that the platen shall be rotated at eachstroke for either single, double or triple line-spacing; and preferablyalso for half-line-spacing and also one 7 and a quarter, one and a halfand two and a half line-spaces for each stroke. This adj ustmentinvolves simply setting the lever 70 edgewise to corresponding stationsor loca- Said lever has a locating tooth 88 adaptedto seat in any one ofa range of notches 89 cut in the bottom edge of the front flange 90 ofthe table; said flange having a beveled reading face 91 having thereondesignations 92 for the gross line-space regulation. It will be seenthat Wherever the regulator-lever is set, its stop 41 will serve toarrest the shoulder of the line-space lever 10, and determine for howmany line-space units the platen shall be rotated at each stroke,rega'rdless of the measurement of the line-space unit that is determinedby the adjustment of the fulcrum-pin 17. When setting theregulator-lever 70, it will be seen that the multiple-tooth pawl 20 willbe maintained out of engagement with the ratchet-wheel, because thereleasing cam is adjusted together with said lever 70, owing to thepivoting of the cam-arm to the lever. The lever may be swung to theright as far as it is desired, from the Figure 4 position, withoutimparting any rotation to the platen, which is a desideratum. If desiredthe line-space lever 10 may be held in its Figure 4 position during theresettings of the regulator 70, although, if required, the two levers 10and 70 may be swung together to either left or right during suchadjustment, and in no case will the pawl 20' be engaged, or the platenrotated. 7

The tooth 88 may project forwardly from a leaf 93 that may be pivotedupon pins 9 1 projecting from the sides of the regulatorlever 70; and aspring 95 may hold the tooth 88 up in any notch, A finger-piece 96 maybe carried by the tooth. oaidleaf may be guided between flanges 97turned down at the, sides of the forward end of lever 70. A detachablestop 98 may be provided upon the lever 70 to lock the latch leaf 93against rearward dis-placement; said leaf having notches 99 whereby itis detachably pivoted upon the opposite pins 9%.

In the diagram at Figure 5, 89 represents the line of space-regulatingnotches. Fulllines A represent the normal positions of the line-spacinglevers when the machine is adjusted for three lme-spaces of maxnnumunitmeasurement; this corresponding to Figure 1. Three-unit spacing may beobtained forany measurement of unit, and fulllines B represent thenormal position of the line-space levers when the fulcrum-pin 17 hasbeen adjusted backwardly to provide a minimum measurement of theline-space unit,

lever 10 is indicated at D. But from every starting position A, B and C,the lever swings to one final position E.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others; as, forexamples, the gross line-space regulatortrain can be employed for fulland fractional line spacin even if no adjustmentof the fulcrum-pin 17 isprovided, and in some cases the returnstop 41 need not be adjustable,and may be omitted from the regulator-train.

Having thus described my invention, I claim:

1. In a line-spacing mechanism, the combination of a line-spacing wheel,a line-space lever having a fulcrum, a movement-multiplying arm to whichis pivoted said line-space lever, the latter having a driving clutch forsaid line-space wheel, said clutcharm being pivoted to turn about theaxis of the linesp'ace wheel, and adjustable means co-operative withsaid fulcrum for varying the lever age of the line-space lever upon theclutcharm.

2. In a line-spacing mechanism, the combination of a line-spacingratchet-wheel having a multitude of teeth of minute pitch, a line-spacelever having a fulcrum which is stationary at the line-spacingoperation, a

movement-multiplying arm pivoted to said line-space lever and having adriving pawl for said line-space wheel, said pawl-arm being pivoted toturn about the axis of the line space wheel and having a maximum strokeof about 120 degrees, and means for adjusting said fulcrum.

3. In a line-spacing mechanism, the combination of a line-spacingratchet-wheel having a multitude of teeth of minute pitch, a line-spacelever, a movement-multiplying arm connected to said line-space lever andhaving a driving pawl for said line-space wheel, said line-space levervibrating upon an axis which is parallel with the axis of the line-spacewheel, said pawl-arm being pivoted to turn about the axis of theline-space wheel, said line-space lever having a fulcrum, and meansaifording an adjustment of said fulcrum, the latter being stationaryduring the line-spacing operation.

l. In a line-spacing mechanism, the combination of a line-spacingratchet-wheel, a line-space lever of the first order and having afulcrum which is stationary during the line-spacing operation, amovement-multiplying arm connected to said line-space lever and having adriving clutch for said linespace wheel, said clutch-arm being directlypivoted to the end of said line-space lever, the latter vibrating uponan axis which is parallel with the axis of the line-space wheel, saidclutch-arm being pivoted to turn about the axis of the line-space wheel,adjustable Vmeans for varying the leverage of the linespace lever uponthe clutch-arm, and means affording an adjustment of said fulcrum, theaxis of the line-space Wheel being between the fulcrum of the line-spacelever and the point of connection of the latter to the pawl-lever.

In a line-spacing mechanism, the co1nbination of a line-spacing Wheel, aline-space lever having a fulcrum, a movement-multiplying arm to wnichis pivoted said linespace lever, the latter having a driving clutch forsaid line-space Wheel, said clutch-arm being pivoted to turn about theaxis of the line-space wheel, adjustable means co-operative with saidfulcrum for varying the leverage of the line-space lever upon theclutcharm, an arbor upon which said line-space wheel is secured, a smallbevel pinion also fixed relatively to said arbor, a large gear meshingwith said pinion, and a revoluble work-sheet carrier driven by saidlarge gear.

6. In a line-spacing mechanism, thecombination of a line-spacing wheel,a line-spacelever having a fulcrum, a movement-multiplying arm to whichis pivoted said linespace lever, the latter having a driving clutch forsaid line-space wheel, said clutch-arm being pivoted to turn about theaxis of the l nespace wheel, adjustable means co-perative with saidfulcrum for varying the leverage of the line-space lever upon theclutcharm, an arbor upon which said line-space wheel is secured, a smallbevel pinion upon said arbor, a large gear meshing with said pinion, arevoluble platen driven by said large gear, and a thumb-wheel upon saidline-space-wheel arbor.

"Z. In a line-spacing mechanism, the combination of a line-spacingwheel, a line-space lover, a movement-multiplying arm connected to saidline-space lever, and having a normally released self-closing drivingclutch for said line-space wheel, said line-space lever having a fulcrumand also having two arms, means 'aifording an adjustment of said fulcrumalong the lever to change the relative length of the two lever arms, thefulcrum being stationary during the line-spacing operation, an arbor forsaid line-space wheel, a pinion upon said arbor, a gear meshing withsaid pinion, a platen driven by said large gear, and a thumb-Wheel uponsaid arbor. I

8. In a line-spacing mechanism, the combination of a line-spacingratchet-wheel having a multitude of teeth of minute pitch, a line-spacelever, a movoment-multiplying arm connected to said line-space lever andhaving a driving pawl for said line-space wheel, said line-space levervibrating upon an axis which is parallel with the axis of the line-spacewheel, said pawl-arm being pivoted to turn about the axis of theline-space wheel, said line-space lever having a fulcrum, meansalfording an adjustment of said lit) fulcrum, the latter beingstationary during the line-spacing operation, an arbor upon which saidline-space wheel is secured, a small bevel pinion also fixed relativelyto said arbor, a large gear meshing with said pinion,

being stationary during the line-spacing operation, and separateindependently settable means for determining the number of units ofspace through which said lever line-spaces the work-sheet at eachoperation,

10. The combination of a line-space wheel, line-space lever having aminutely-variable fulcrum which is stationary during the linespacingoperation, a pawl for said wheel, driving means connecting said lever tosaid pawl, means settable independently of said fulcrum for determiningthe number of units of space through which said lever line-spaces thework-sheet, and a stationary stop for arresting said pawl and preventingoverthrow of the line-space wheel, the adjustment of said fulcrum beingin a direction such that at all adjustments thereof said line-spacelever is arrested by said stationary stop.

11. The combination of a line-space wheel, a. line-space lever having aminutely-variable fulcrum which is stationary during the linespacingoperation, a pawl for said wheel, driving means connecting said lever tosaid p wl, means settable independently of said fulcrum for determiningthe number of units of space through which said lever line-spaces thework-sheet, and a stationary stop for arresting said pawl and preventingoverthrow of the line-space wheel, said lever having a longitudinal slotalong which said fulcrum-pin is adjustable, and said slot being soformed that when the lever is arrested by said step, the direction ofits said slot is coincident with the direction of adjustment of saidfulcrum-pin.

12. The combination of a line-space wheel, a line-space lever having twoarms, a clutch for said wheel, means connecting said lever to saidclutch, a fulcrum for said lever which is stationary during theline-spacing operation, a slide upon which said fulcrum is rigidlyfixed, said slide and fulcrum being movable along the lever to changethe relative length of the two lever-arms, means for guiding said slide,and a finger-piece for operating the slide.

13. The combination of a line-space wheel, aline-space lever, a clutchfor said wheel, a fulcrum for said lever which is stationary during theline-spacin operation, a slide upon which said fulcrum is rigidly fixed,means ior guiding said slide, a finger-piece for operating the slide,means for retaining said slide where adjusted; said fulcrum projectingfrom said slide to co-operate with said line-space lever, and an arm tooperate said clutch, said arm directly pivoted to said lever and alsomounted to swing about the axis of said line-space wheel.

14. The combination of a line-space wheel, a line-space lever, a clutchfor said wheel, a fulcrum for said lever which is stationary during theline-spacing operation, aslide upon which said fulcrum is rigidly fixed,means for guiding said slide, a finger-piece for operating the slide,means for retaining said slide where adjusted; said fulcrum projectingfrom said slide to co-operate with said line-space lever, an arm tooperate said clutch, said arm directly pivoted to said lever and alsomounted to swing about the axis of said line-space wheel, and anoverthrowpreventing stop engageable by said clutch, said lever having afulcrum-slotwhich is parallel with said slide-guide when the lever isarrested by said stop.

15. The combination of a line-space wheel having a great multitude ofteeth of minute pitch, a line-space lever having two, arms, a pawl forsaid wheel, driving means connecting said lever to said pawl, a fulcrumfor said lever which is stationary during the line-spacing of theplaten, a slide upon which said fulcrum is rigidly fixed, said slide andfulcrum being movable along the lever to change the relative length ofthe two leverarms, means for guiding said slide, a fingerpiece foroperating the same, means for retaining said slide where adjusted,separate means adjustable independently of said fulcrum for determiningthe number of units of space through which said lever line-spaces thework-sheet at each operation, and a stop for arresting said pawl andpreventing overthrow, the direction of adjustment of said slide beingsuch that at all adjustments thereof said line-space lever is arrestedby said stop.

16. The combination of a line-space wheel, a line-spacing trainincluding a line-space lever, a wheel-driving clutch, a driver for saidclutch, said driver connected to said lever,'a line-space-regulatortrain which is mainly a doubling of said line-spacing train and includesa regulatordever coincidently fulcrumed with said line-space lever andhaving connected thereto a regulator-arm whose pivoting andlever-connection are co incident with those of said driver, saidregulating arm having means for releasing said clutch from said wheel, adevice common to both levers for varying their leverage, alinespace-regulating set of stations, means to detain saidregulatordever selectively at different stations, and a clutch-lockingstop to arrest said line-space lever at the same position for drivingstrokes of varying lengths.

17. The combination 'with a line-space wheel, of a line-spacingdrive-train, a linespace-regulator train for said line-spacing train andincluding a regulator-lever having pivoted thereto a regulator-arm, thelatter pivoted concentrically with said wheel and having means forcontrolling the connection I of said drive-train with said wheel, and a1 device for minutely varying the leverage of said regulator-lever.

18. The combination with a line-space wheel, of a line-spacingdrive-train, a linepace-regulator train for said line-spacing train andincluding a regulator-lever having pivoted thereto a regulator-arm, thelatter pivot-ed concentrically with said wheel and having means forcontrolling the connection of said drive-train with said wheel, a devicefor minutely varying the leverage of said regulator-lever, means, todetain said regulator-lever selectively at difierent set stations, andan overthrow preventing stop to arrest said driving train at the sameposition for driving strokes of all extents.

19. The combination of a line-space wheel having a multitude of minuteteeth, a linespacing train including a line-space lever, a wheel-drivingpawl, and a driving arm for said pawl, said driving arm pivoted to saidlever and also pivoted to turn about the axis of said wheel, aline-space-regula'tor train which is mainly a doubling of saidline-spacing train andincludes a regulator-lever coin- K; cidentlyfulcrumed with said line-space lever and having pivoted thereto aregulatorarm which is coincidently mounted and pivoted with respect tosaid pawl-arm, said regulating arm having means for releasing said pawlfrom said wheel, a single device for adjusting the fulcrums of bothlevers, a rack, and means to detain said regulator-lever selectively atdifferent points in said rack.

20. The combination of a line-space wheel 'havin a multitude of minuteteeth, a linespacing train includin a line-space lever, 21'

wheel-driving pawl, and a driving arm for said pawl, said driving armplvoted to said lever, and also pivoted to turn about the axis of saidwheel, a line-space-regulator train which is mainly a doubling of saidline-spacing train and includes a regulator-lever coincidently fulcrumedwith said line-space lever and having pivoted thereto a regulator-arinwl 'ch is coincidently mounted and pivoted with resp ct to saidpawl-arm, said regulating arm having means for releasing said pawl fromsaid wheel, a single device for ad- 7 justing the fulcrums of. bothlevers, a rack, means to detam said regulator-lever selecstop to arrestsaid line-space lever at the same position for driving strokes ofvarying extents.

21. The combination with a line-space wheel, of a driving traintherefor, including a line-space lever, an arm pivoted thereto, a clutchoperated by said arm for driving said line-space wheel, a stop to arrestthe driving stroke of the line-space lever, a line-spaceregulating traineffective upon the return movement of said line-space lever, saidregulating train including a lever and means pivoted thereto to releasesaid clutch from said wheel, said releasing means forming mainly adouble of said clutch-arm, the pivot which connects said line-spacelever to said clutch-carrying arm being coincident with the pivot thatconnects the regulating lever with the clutch-releasing means, saidclutch-arm being co-incidently mounted with said releasing means, andmeans including a system of stations for selectively positioning saidlinespace-regulating train for various full linespacing movements andalso various fractional line-spacing movements.

22. The combination with a line-space wheel having teeth, of a drivingtrain therefor, including a line-space lever, an arm pive oted thereto,a pawl operated by said arm for driving said line-space wheel, anoverthrowpreventing stop to engage said pawl and ar rest the drivingstroke of the line-space lever, a line-space-regulating train effectiveat the return movement of said line-space lever, said regulating trainhaving means to release said pawl from said wheel, said releasing meansforming mainly a double of said pawl-arm, the pivot which connects saidline-space lever to said pawl-arm being coincident with the pivot thatconnects the regulating leverwith the pawl-releasing means, saidpawl-arm being coincidently mounted with said releasing means, and meansincluding a system of stations for selectively positioning said line'-space-regulating train for various'full linespacing movements and alsovarious fractional line-spacing movements. 7

23. The combination with a line-space wheel, of a driving traintherefor,.including a line-space lever, an arm pivoted thereto, a clutchoperated by said arm for driving said line-space wheel, a stop to arrestthe driving stroke of the line-space lever, .a line-spacemeans, and alocating rackto co-operate with said regulator-lever to retain itselectively at predetermined full-space and fractionalspace locations,said regulator-lever and said line-space lever having a commonadjustable fulcrum, and said clutclrarm and said releasing means beingmounted concentrically with said line-space wheel.

24. The combination with a line-space wheel, of a driving traintherefor, including a line-space lever, an arm pivoted thereto, a clutchoperated by said arm for driving said line-space wheel, a stop to arrestthe driving stroke of the line-space lever, a line-spaceregulating traineffective upon the return movement of said line-space lever, saidregulating train including a lever and means piv oted thereto to releasesaidclutch from said wheel, said releasing means forming mainly a doubleof said clutch-arm, the pivot which connects said line-space lever tosaid clutcharm being coincident with the pivot that connects theregulating lever with the clutchreleasing means, said clutch-arm beingcoincidently mounted with said releasing means, a locating rack toco-operate with said regulator-lever to retain it selectively atpredetermined locations, said regulator-lever and said line-space leverhaving a common adjustable fulcrum, said clutch-arm and said releasingmeans being mounted concentrically with said line-space wheel, an arborfor said linespace wheel, and a fixedshaft within which said arbor isjournaled, said clutch-arm and ;releasing means being pivoted upon saidshaft.

25. In a line-spacing mechanism for a typowriting machine having arevoluble platen, the combination of a line-space lever having two arms,a movement-multiplying arm to which said line-space lever is pivoted, apawl driven by said movement-multiplying arm, a fine-toothed line-spacewheel engageable by said pawl, the connection being such that saidpawl-arm, together with said line-space Wheel, is vibrated through. afar greater angular extent than said line-space lever, movement-reducinggearing between said linespace wheel and said revoluble platen, andmeans for adjusting thefulcrum of the linespace lever longitudinally ofsaid lever, to change the relative length of the two leverarms. 7

26. In a line-space mechanism for a typewriting machine, the combinationof a linespace wheel, a line-spacing train including both a lever and amovement-multiplying arm pivoted thereto, the arm being mounted torotate coaxially with said line-space wheel, a clutch operated by saidarm, a line-spaceregulating train forming mainly a double of saidline-spacing train and'including a lever and a releasing device for saidclutch, and means for varying-the leverage of said linespace lever uponsaid movement-multiplying arm and concomitantly varying the leverage ofsaid regulating lever upon said releasing device, said regulating leverbeing adjustable.

27. The combination of a line-space wheel, a line-spacing train whichincludes both a lever and a movement-multiplying arm to which the leveris directly pivoted, said arm mounted to rotate coaxially with saidlinespace wheel, a clutch for connecting said arm to said wheel, aline-space-regulating train forming mainly adouble of said line-spacingtrain and including a lever, said levers having coincident adjustablefulcrums, said regulating train including a clutch-releasing arm pivotedto said regulating lever coincidently with the pivot of said clutch-armto the linespace lever, a system of stations, and means for detainingsaid regulating arm at any station.

28. The combination with a line-space wheel, of a line-space handle inthe form of a lever of the first order, a support having mounted thereonfor adjustment a fulcrumpin for said lever, a movement-multiplyingclutch-arm to which said lever is directly pivoted, said clutch-armbeing in the form 01 a lever of the third order and being pivotedconcentrically with a said line-space Wheel, and effective to drive thelatter, and

.movement-reducing gearing'for connecting said line-space Wheel to anelement to be linespaced. 7

29. The combination with a line-space wheel, of a line-space handle inthe form of a lever of the first order, a support having mounted thereonfor adjustment a fulcrumpin for said lever, a movement-multiplyingclutch-arm to which said lever is directly pivoted, said clutch-armbeing in the form of a lever of the third order and being pivotedconcentrically with said line-space wheel, and effective to drive thelatter, movement-reducing gearing for connecting said line-space wheelto an element to be line-spaced, said line-space Wheel being movable bysaid clutchlever through about 120 degrees at maximum stroke, and athumb-wheel mounted on said movement-reducing gearing.

30. In a line-spacing mechanism, the combination of a line-spacingwheel, a line-space lever having a fulcrum, a movement-multiplying armto which is pivoted said line-space lever, the latter having a drivingclutch for said line-space wheel, said fulcrum-pin being made adjustableto different positions lengthwise of the line-space lever, the leverhaving a slot for the fulcrum-pin, a slide upon which said fulcrum-pinis fixed, and means for guiding said slide, the latter being providedwith a fingerrpiece.

31. In a line-spacing mechanism, the combination of a line-spacingwheel, a line-space lever having a fulcrum, a movement-multiplying armto which is pivoted said linespace lever, the latter having a drivingclutch for said line-space wheel, said fulcrum-pin being made adjustableto different positions lengthwise of the line-space lever, the leverhaving a slot for the fulcrum-pin, a slide upon which said fulcrum-pinis fixed, means for guiding said slide, the latter being provided with afinger-piece, and independent means, including a rack and a memberadjustable along said rack, for selectively determining the length ofstroke of the linespace lever without disturbing the adjustment of saidfulcrum-pin.

32. The combination of a line-space wheel, a line-spacing trainincluding a line-space lever, a wheel-driving clutch, and a driver forsaid clutch, said driver connected to said lever, a line-space-regulatortrain which is mainly a doubling of said linespacing train and includesa regulator-lever coincidently fulcrumed with said line-space lever andhaving connected thereto a regulator-arm whose pivoting andlever-connection are coincident with those of said driver, saidregulating arm I having means for releasing said clutch from said wheel,a fulcrum-pin, common to both levers, being made adjustable to differentpositions lengthwise of the levers, each lever having a slot for thefulcrum-pin, and a slide upon which said fulcrum-pin is fixed, saidslide being provided with a finger-piece and with guiding means, andbeing stationary during the line-spacing operation.

33. In a line-spacing mechanism, the combination of a line-spacingwheel, a line-space lever having a fulcrum, a movement-multiplying armto which is pivoted said line-space lever, the latter having a drivingclutch for said line-space wheel, a stop for arresting the line-spacelever and wheel, and constructed to maintain engagement of the clutchwith the wheel, a table above said wheel and lever, a slide having afulcrum-pin for said lever, a guide being provided upon said table forsaid fulcrum-pin slide, and means to maintain s id slide where it isadjustechsaid lever having a fulcrum pin slot and said guide eXtend ingin the same direction as the slot in the line-space lever when it is atthe end of its driving stroke.

3%. In a line-spacing mechanism, the combination of a line-spacingwheel, a line-space leverhaving a fulcrum, a movement-multiplying arm towhich is pivoted said line-space lever, the latter having a drivingclutch for i said line-space wheel, a stop for arresting the line-spacelever and wheel, and constructed to maintam engagement of the clutchwith the wheel, atable overlying said wheel and lever, a slide having afulcrum-pin for said lever, a support and guide for. said slide fastenedupon said table, said lever having a slot, guiding means forsaid slideextending in the same direction as the slot in the line space lever whenat the end ofits driving stroke, a guide-block provided upon saidfulcrum pin and fitted to the slot in said lever,

stroke of the line-space lever, a line-spaceregulating train effectiveupon the return movement of said line-space lever, said regulating trainincluding a lever and means pivoted thereto to release said clutch fromsaid wheel, said releasing means forming mainly a double of saidclutch-arm, the pivot which connects said line-space lever to saidclutcharm being coincident with the pivot that connects the regulatinglever with the clutchreleasing means, said clutch-arm being coincidentlymounted with said releasing means, a fulcrum-pin common to said levers,a slide from which said fulcrum-pin projects, and a guide for saidfulcrunrpin slide, each of the levers being longitudinally slotted forsaid pin, said guide extending in the same di rection as the slot in theline-space lever when the latter is at the end of its driving stroke.

36. In a line-spacing mechanism, the combination of a line-spacingwheel, a train'of' driving devices therefor, including a lever, saidlever having a supportlng member which is fixed relatively to theframework during the line-spacing operation, said supporting memberbeing adjustable relatively to said lever, to afford variation in themeasurement in the line-spacing unit, and independentlyadjustable meansfor use in determining the number of units to be included in thelinespace operation.

37. The combination of a line-space wheel, a line-space lever, anadjustable fulcrum forv said lever, a movement-multiplying and clutchingdevice for connectlng said lever to the line-space wheel, aclutch-locking stopfor arresting the drive-stroke of the lever, anadjustable stop for the return stroke of the lever, and clutch-releasingmeans adjustable simultaneously with said stop andito a correspondingextent.

38. The combination of a line-spacing Wheel, a train of driving devicestherefor, in-

cluding a lever, said train having a supporting member which is fixedrelatively to the framework during theline-spacing operation, saidsupporting member being adjustable to afford variation in themeasurement in the line-spacing unit, and said supporting member havinga fulcrum for said lever, a movement-multiplying and clutching devicebeing provided for connecting said lever to the linespace wheel, aclutch-locking stop for arrestint lid

ing the drive stroke of the lever, an adjustable stop for the returnstroke of the lever, adjustable clutch-releasing means, and independently-adjustable means for use in determining the number of units tobe included in the line-space operation.

39. The combination of a member to be line-spaced, a line-space wheel, apawl, a pawl-arm, a driver, a table, an arbor upon which said line-spacewheel is fixed, a fixed shaftor bearing-post through which said arborextends, said pawl-arm having a hub whereby it is pivoted to saidshaft,means securing said shaft to the bottom of said table, a pinion fixedupon said arbor, a gear meshing with said pinion and driving saidmember, said shaft having a shoulder upon which rests the hub ofsaidpawl-arm,afastening nut threaded upon the upper end of said shaft todraw it up against said table, and a collar confined between thetable-top and the shaft to enable the nut to force the shaft firmly upto its seat, said arbor extending up through the table and providedthereover with a thumb-wheel.

40. In a line-spacing mechanism, the combination with a line-spacewheel, of a driving train therefor including a lever, amovementmultiplying arm driven thereby, a clutch actuated by said arm,said clutch being normally disengaged from said wheel and provided withmeans for automatically clutching the arm to the wheel upon the startingof said lever in motion, a clutch-locking stop to limit the line-spacingstroke of the lever, an adjustable arm having a clutch-releaser, and aregulating lever connected to said clutch-releasing arm, saidclutch-releaser effective to keep the clutch released throughout alladjustments of said adjustable arm, whereby the arm may be selectivelyset without disturbing said line-space wheel.

41. In a line-spacing mechanism, the combination with a line-space wheelhaving fine .teeth, of a driving train therefor including a lever, amovement-multiplying arm driven thereby, a pawl actuated by said arm,said pawl being normally disengaged from said wheel and provided withmeans for automatically clutching the arm to the wheel upon the startingofsaid lever in motion, a pawl-locking stop to limit the line-spacingstroke of the lever, an adjustable arm having a pawl-releaser, and aregulating lever coni nected to said pawl-releasing arm, said regulating lever having a stop for said line-space lever to arrest itsreturn stroke, said pawlreleaser connected to move together with saidstop to keep the pawl released throughout all adjustments of saidregulating train, whereby the regulating train may be selectively setwithout operating said line-space wheel.

42. In a line-spacing mechanism, the combination of a line-spacingwheel, a line-space lever having a fulcrum, a movement-multlplying armto which is pivoted said line-space lever, said arm having a drivingclutch for said line-space wheel, said clutch-arm being pivoted to turnabout the axis of the linespace wheel, and adjustable means co-operative with said fulcrum for varying the leverage of the line-space leverupon the clutcharm, said clutch having a projection, and a releasing camin the path thereof, said cam being settable to regulate the length ofthe line-spacing movement.

43. The combination of a line-space wheel, a line-spacing trainincluding a line-space lever, a wheel-driving clutch, and a driver forsaid clutch, said driver connected to said lever, a line-space-regulatortrain which is mainly a doubling of said line-spacing train and includesa regulator-lever coincidently fulcrumed with said line-space lever andhaving connected thereto a regulator-arm whose pivoting andlever-connection are coincident with those of said driver, saidregulating arm having means for releasing said clutch from said wheel,said line-space lever having an adjustable fulcrum, means where by theadjustment of said line-space-lever fulcrum is made effective to adjustthe position of the clutch-releaser, said regulatortrain. beingadjustable to different set stations, and means whereby the selectivesetting of said regulator-train is also made effective to adjust theposition of said clutchreleasing means.

44:. In a line-spacing mechanism, the com bination with a line-spacewheel and a driving train having a normally-released clutch for engagingthe wheel, of a regulating train having an adjustable stop for theline-spacing train and having a clutch-releasing cam adjustablesimultaneously with said stop, a system of set stations, means fordetaining said stop at any one of the set stations, and adjustable meansefiective alike upon said driving train and said regulating train foreffecting minute variations in the measurement of the line-spacing unit,said line-spacing train and said regulating train being substantiallycoincident and superposed one upon the other to operate upon a commonadjustable fulcrum-pin, and also including members mounted upon a commonfixed shaft which is coincident with the axis of the linespace wheel.

45. In a line-spacing mechanism, the combination with a line-space wheeland a driving train having a normally-released clutch for engaging thewheel, of a regulating train having an adjustable stop for theline-spacing train and having a clutch-releasing cam adjustablesimultaneously with said stop, a system of set stations, means fordetaining said stop at any one of the set sta} tions, and adjustablemeans effective alike upon said driving train and said regulating trainfor efi'ecting minute variations in the measurement of the line-spacingunit, said line-spacing train and said regulating train beingsubstantially coincident and superposed one upon the other to operateupon a common adjustable fulcrum-pin, and also in= eluding membersmounted upon a common fixed shaft which is coincident with the axis ofthe line-space wheel, the line-spacing train including a lever operatingupon said fulcrum-pin and also including a clutch-arm mounted upon saidfixed shaft and pivoted to said line-space lever, said regulating trainalso including a lever also mounted upon said fulcrum and also includinga releasing arm pivoted to said regulating lever co-incidently with thepivoting of said clutch-arm to the line-space lever.

a6. In a line-spacing mechanism, the combination with a line-spacewheel, of a driving train having a clutch to cooperate with said wheel,a regulating train for variably limiting the extent of line-spacemovement, said regulating train including an adjustable clutch-releaser,and adjustable means effective upon both trains for varying the extentof both the wheel-movement and the movement of the power-end of thedriving train, and simultaneously and automatically effective to vary tocorresponding extent the adjustment of the clutch-releaser, and meansfor selectively positioning the regulating train at any one of a seriesof permanently located stations.

l7. The combination of a line-space wheel, a line-spacing trainincluding a line-space lever, a wheel-driving'clutch, a driver for saidclutch, said driver connected to said lever, a line-space-regulat rtrain which is mainly a doubling ofsaid linespacing train and includes aregulator-lever coincidently fulcrumed with said line-space lever andhaving connected thereto a regulator-arm whose pivoting andlever-connection are coincident with those of said driver, saidregulating arm having means for releasing said clutch from said wheel, afulcrum-pin, common to both levers, being made adjustable to difierentpositions lengthwise of the levers, each lever having a slot for thefulcrum-pin, and a slide upon which said fulcrum-pin is fixed, saidslide being provided with a fingenpiece and with guiding means, andbeing stationary during the line-spacing operation, the linespace leverand the regulating lever being placed facewise one over the other, thecommon fulcrum-pin for said slotted levers being vertical and passingthrough both slots, said releasing arm in the form of a bail-member, afixed shaft, said line-space wheel having an arbor in said shaft, saidbail having upper and lower bearings upon said shaft, the uppermember'of said bail being pivoted to said regulating lever, and thelower member of said bail being the clutc'lrreleasing element, saidlevers being disposed between the upper and lower members of said bail,said bail resting upon a flange that is formed upon the lower part ofthe fixed shaft, and a shoulder provided upon saio fixed shaft uponwhich said upper bail-arm is fitted.

48. The combination of a line-space wheel, a pawl-arm, a driver, atable, an arbor upon which said line-space wheel is fixed, a fixed shaftor bearing-post through whichsaid arbor extends, said pawl-arm having ahub whereby it is pivoted to said shaft, means securing said shaft tothe bottom of said table, a'pinion fixed upon said arbor, a gear meshingwith said pinion and driving the linespacing element of the machine,said shaft having a shoulder upon which rests the hub of said pawl-arm,a fastening nut threaded upon the upper end of saidshaft to draw it upagainst said table, a collar confined between the table-top and theshaft to enable the nut to force the shaft firmly up to its seat, saidarbor extending up through the table and provided thereover with athumbwheel, said table overlying the line-spacing lever system andline-space wheel, a bracket for supporting said plate upon the carriageof a typewriting machine, said bracket having a bearing for theplaten-axle, and an auxiliary bracket also secured to the 'end of thetypewriter-carriage and having a bearing in proximity to said gear forthe platen-axle, and also having a portion to form a bearing for thelower ends of the vertical wheelarbor, said bracket bent to form aclutchlocking stop, said bracket also having a brace attached to theleft-hand border of the table.

49. The combination of a line-space wheel, a pawl, a pawl-arm, a driver,a table,-an arbor upon which said line-space wheel is fixed, a fixedshaft or bearing-post through which said arbor extends, said pawl-armhaving a hub whereby it is pivoted to said shaft, a pinion fixed uponsaid arbor, a gear mesh-. ing with said pinion and driving thelinespacing element of the machine, said shaft having a shoulder uponwhich rests the hub of said pawl-arm, a fastening nut threaded upon theupper end of said shaft to draw it up against said table, a. collarconfined between the table-top and the shaft to enable the nut to forcethe shaft firmly up to its seat, said arbor extendingup through thetable and provided thereover with a thumb-wheel, and means for affordingregulation of the gross line-space stroke of the driver for eithersingle, double or triple line-spacing, and also for fractionalline-spacing, including a regulator-lever and means for setting the sameselectively to different locations, said regulator having a locatingtooth, and said ma chine provided with a range of notches to beselectively engaged by said tooth, said notches cut in the border ofsaid table, said regulator-lever having a stop to terminate the returnstroke of the line-space driver, said regulating means including aclutch-releaser which is adjusted together with the regulatingstop-lever, said regulating stop-lever being movable to any positionwhile maintaining the clutch in released position, and being swingabletogether with said driver to either left or right during the setting ofthe regulator, without rotating the line-space wheel.

50. The combination of a line-space wheel, a pawl, a pawl-arm, a driver,a table, an arbor upon which said line-space wheel is fixed, a fixedshaft or bearing-post through which said arbor extends, said pawl-armhaving a rub whereby it is pivoted to said shaft, means securing saidshaft to the bottom of said table, a pinion fixed upon said arbor, agear meshing with said pinion and driving the line-spacing element ofthe machine, a lever for regulating said pawl-arm and having a leafmounted thereon, and provided with a tooth to engage notches in saidtable, a spring for said leaf and tooth, and a finger-piece for saidregulating lever.

51. The combination of a typewriter-element to be line-spaced, aline-space wheel having minute teeth, movement-reducing gearing toenable said line-space wheel to drive said element, a normally releasedpawl for driving said line-space wheel, an over throw-preventing stopfor said pawl, a linespace regulator connected to control said pawl andadjustable to different set stations to predet-ermine the number ofline-spacing units composing each stroke, and independently adjustablemeans co-operating with said pawl for varying the measurement of theline-spacing unit.

52. The combination of a line-space driver, a line-space wheel, a pawlfor said wheel, a line-space regulator including a lever having a'minutely-variable fulcrum, means enabling said regulator-lever tocontrol said pawl, means independently settable for determining thenumber of units of space through which said driver line-spaces thework-sheet, and a stationary stop for arresting said pawl and preventingoverthrow of the line-space wheel, said line-space pawl being arrestedby said stationary stop at all adjustments of said fulcrum.

53. The combination of a line-space driver, a line-space wheel, a pawlfor said wheel, a line-space regulator including a lever having aminutely-variable fulcrum, means enabling said regulator-lever tocontrol said pawl, means independently settable for determining thenumber of units of space through which said driver line-spaces thework-sheet, and a stationary stop for arresting said pawl and preventingoverthrow of the line-space wheel said line-space pawl, being arrestedby said stationary stop at all adjustments of said fulcrum, said leverhaving a longitudinal slot along which said fulcrum is adjustable, andsaid slot being soformed that when the lever is arrested by said stop,the direction of its said slot is coincident with the direction of trolsaid clutch, and adjustable means for releasing the driving clutch fromsaid wheel.

55. The combination with a line-space wheel having minuteteeth, of aline-spacing drive-train, a line-space-regulator lever for saidline-spacing train, a regulator-arm connected thereto, said arm pivotedconcentrically with said wheel and having means for controlling theconnection of said drivetrain with said wheel, a device for minutelyvarying the leverage of said regulator-lever,

and means to detain said regulator-lever selectively at different setstations.

56. The combination with a line-space wheel having minute teeth, of aline-spacing drive-train, a line-space-regulator lever for saidline-spacing train, a regulator-arm connected thereto, said arm pivotedconcentrically with said wheel and having means for controlling theconnection of said drive-train with said wheel, a device for minutelyvarying the leverage of said regulator-lever, means to detain saidregulator-lever selectively at different set stations, and anoverthrow-preventing stop to arrest said driving train at the sameposition for driving strokes of all extents.

57. In a line-spacingmechanism, the combination of a line-spacing wheelhaving minute teeth, a lever, a movement-multiplying arm for said lever,the latter having a driving clutch for said line-space wheel, aline-space-regulator lever having a fulcrum, means for adjusting saidfulcrum to different positions lengthwise of the regulator-lever, thelatter having a slot for the fulcrum,

a slide carrying said fulcrum, means for guldmg said slide, and adustable means for releasingthe clutch from sald wheel.

loo

58. In a line-spacing mechanism, the combination of a line-spacing wheelhaving minute teeth, a line-space lever, a movementmultiplying arm forsaid line-space lever, the latter having a driving clutch for saidlinespace wheel, a line-space-regulator lever having a fulcrum, saidfulcrum being made adjustable to different positions lengthwise of thelever, the lever having a slot for the fulcrum, a slide carrying saidfulcrum, means for guiding said slide, and independent means, includinga rack and a member adjustable along said rack, for selectivelydetermining the length of stroke of the linespace lever.

59. The combination of a line-space wheel, a line-space lever, awheel-driving clutch, and a driver for said clutch, said driver operatedby said lever, a regulator-lever, having connected thereto an arm, thelatter having means for releasing said clutch from said wheel, saidregulating lever having an adjustable fulcrum, means whereby theadjustment of said fulcrum is made effective to vary the eii ectivepoint of the clutch-releaser, said regulator-train being also adjustableto different set stations independently of the adjustment of saidfulcrum, and means whereby the selective setting of said regulator trainis also made effective to regulate the efiective point or saidclutch-releasing means.

.60. In a line-spacing mechanism for a typewriting machine having arevoluble platen, the combination of a line-space lever, amovementanultiplying arm to 'which said line-space lever is connected, apawl driven by said movement-multiplying arm, a linespace wheel havingteeth of minute pitch engageable by said pawl, the connection being suchthat said pawl, together with said linespace wheel, is vibrated througha far greater angular extent than said line-space lever,movement-reducing gearing between said line-space wheel and saidrevoluble platen, an adjust-able regulating train having means forcontrolling the engagement of said pawl with said line-space wheel, saidregulating train including a lever and means for adjusting its leveragefor eiiiecting minute variations in the length of the line-spacing unit,and a device having a set of stations to which said lever may also beset according to the number of units to be included in the linespacingstroke of the platen.

61. Machine according to claim 60, in which an overthrow stop isco-operative with said pawl at the conclusion of every drive-stroke ofthe linespace lever.

62. In a line-spacing mechanism for a typewriting machine having arevoluble platen, the combination of a line-space lever, amovement-multiplying arm to which said linespace lever is connected, apawl driven by said 1noveinent-multiplying arm, a line-space wheelhaving teeth of minute pitch engageable by said pawl, the connectionbeing such that said pawl, together with said line-space wheel, isvibrated through a far greater angular extent than said line-spacelever, movement-reducing gearing between said linespace wheel, and saidrevoluble platen, an adjustable regulating train having means forcontrolling the engagement of said pawl with said line-space wheel, saidregulating train including a lever, adjustable means co-operative withsaid regulating lever for varying its that said )awl to ether withsaidline-s ace wheel, is vibrated through a far greater an gular extentthan said line-space lever,-movement-reducing gearing between saidlinespace wheel and said revoluble platen, an adjustable regulatingtrainhaving means for controlling the engagement of said pawl with saidline-space wheel, said regulating train including a lever, adjustablemeansco-operative with said regulating lever for varying its leverage,said pawl having a projection,

and a releasing cam in the path of said pro-v jection, said cam beingsettable by said regulating lever to vary the length of the linespacingmovement, by a leverage-changing movement of said regulating lever tovary the extent of the line-spacing unit, and being. also settable by aswing of said lever to regulate the number of units included in theline-spacing movement of the platen.

64. The combination of a line-space Wheel provided with an arbor andhaving a multitude of minute teeth, a line-spacing train including aline-space lever and a wheel-driving pawl, a line-space-regulator trainwhich includes a regulator-lever fulorumed eccentrically of said arborand having pivoted thereto a regulator-arm, the latter having means forreleasing said pawl from said wheel, a device for minutely adjusting thefulcrum of said regulator-lever, a rack, and means to detain saidregulator-lever selectively at different points in said rack.

65. The combination of a line-space wheel having a multitude of minuteteeth, a linespacing train including a line-space lever and awheel-driving pawl, a linespace-regulator train which includes aregulator-lever fulcrumed eccentrically of said line-space wheel andhaving pivoted thereto a regulator-arm, the latter having means forreleasing said pawl from said wheel upon the return stroke of theline-space lever, a device for varying the leverage ofsaidregulator-lever, a rack, means to detain said regulator-leverselectively at different points in said rack, and a single stop toarrest said line-space lever at the same position for driving strokes ofall extents, said stop eilective to prevent overthrow of said line-spacewheel.

66. The combination with a line-space wheel having an arbor, of aline-space lever,

a clutch for enabling it to drive said linespace Wheel, a stop to arrestthe driving stroke of the line-space lever, a line-space-regulator trainincluding a lever fulcrumed eccentrical- 1y of the line-space Wheel, andmeans pivoted to said regulator-lever to release said clutch from saidwheel, said releasing means being mounted concentrically with saidline-space wheel, a fixed shaft upon which said arbor is journaled, saidreleasing means being pivoted upon said shaft, a pivot connecting theregulator-lever with said releasing means, and a locating rack toco-operate with said regulator-lever to retain it selectively atpredetermined locations, said regulator-lever having an adjustablefulcrum.

67 In a line-space mechanism for a typewriting machine, the combinationof a linespace wheel, a line-spacing train including both a lever and amovement-multiplying arm driven thereby, the arm being mounted to rotatecoaxially with said line-space wheel, a clutch operated by said arm, aline-spaceregulating train including a lever and a releasing device forsaid clutch, said releasing device pivoted coaxially with said wheel,and pivoted to said regulating lever, and means for varying the leverageof said regulating lever upon said releasing device, by adjusting thefulcrum of said regulating lever.

BURNHAM C. STICKNEY.

